Method of testing lubricants.



P. c. E. GOETZE.

METHOD OF TESTING LUBRICANTS.

(Application filed Oct. 21, 1901.

Patented May. 20, I902.

(No Model.)

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PAUL OARL EDUARD GOETZE, OF HAMBURG, GERMANY, ASSIGNOR OF ONE HALF TO FIRM OF FRANZ SANDER, OF HAMBURG, GERMANY.

METHOD OF TESTING ruemcmqrs ,v

SPECIFICATION forming part of Letters Patent N 0. 700,683, dated May 20, 1902.

Original application filed July 25, 1901, Serial No. 69,724. Divided and this application filed October 21, 1901. Serial No. 79,450. (No model.)

To all whom it may concern:

Be it known that I, PAUL CARL EDUARD GOETZE, a subject of the German Emperor, and a resident of Hamburg, in the German Empire, have invented a certain new and useful Improved Method of Testing Lubricants, (being a division of application, Serial No. 69,724, filed July 25, 1901,) of which the following is a specification.

to This invention relates to an improved method of testing lubricants and ascertaining the quantity, quality, and efficacy of lubricants usedin connection with the working orpressure medium in the cylinders of piston- I 5 engines, particularly steam-driven engines.

The chief object of the invention is to supply means which will enable in each individual case of making visible signsby which the condition and relative amounts of the lubricant existing in the working medium at each portion of the stroke of the piston may be observed and of ascertaining by such registering the most suitable lubricant for any particular engine, whether the distribution of the lubricant in the interior of the steam-cylinder is uniformly carried out, and whether the cylinder receives too much or not enough lubricant-in other words, how far the lubricant may be econo mized. Hitherto in order to ascertain these facts so important for the undisturbed working of piston-engines it was necessary to stop the engine and remove the cylinder-cover. Besides the objectionableinterruption in the service, the

aforementioned procedure has the further disadvantage that by inspection of the machine while it is at a standstill it is only possible to ascertain the faulty lubrication, but not the cause of it.

My invention consists, mainly, in that during the working of the machine steam or other workingmedium from the cylinder is caused to impinge on a surface, (preferably on a paper strip,) which is preferably moved to correspond with the piston motion. The lubricant mixed with the steam is deposited on the surface, and thus the intensity, distribution, and coloring of the grease or oil spot enables an estimate to be formed as to the quantity, quality, and distribution of the lu- 5o bricant.

The drawingindicates a form of apparatus suitable for carrying out the method and consists of a short tube a, fitted at its free end with a tap 0, formed with a nozzle b, and at its opposite end with a suitable screw joint or union d, preferably in the form of a cock, designed to be secured to the indicator-socket of an engine-cylinder.

The tube a is provided intermediate its ends with a pressure-gage e and thermometerf, and the box of the tap with a bent arm g, suitably connected thereto. The said bent arm carries at its free end an indicator-drum h, such as is customarily employed in steamindicators and so disposed as to face with its peripheral surface the nozzle 1) of the tap c. The drum h is adapted to be rotated or oscillated on its axis by the cord 71 in the manner usually adopted for indicators in oppo- 7o sition to a spring arranged in the interior of the drum and not shown in the drawing. The drum is further provided with tongues or clips 7c for fastening the paper strip or card that is to receive the record on the drum. 75

The operation is as follows: The card having been secured to the cylinder h and the union d secured to the cylinder of the engine and the cord i secured to a moving part of the engine or a suitable reducing motion, so that said cylinder It will be moved either in synchronism with or proportionately to the motion of the piston of the engine, the tap c is opened to allow a jet of steam from the nozzle 1) to impinge upon the card carried by the cylinder h. The oil in the steam will leave a record on the card after the moisture of the steam has evaporated. It is clear that in this manner a correct estimation of the distribution of the lubricant is obtained, while at the same time proof is furnished whether the steam affects the lubricant favorably or decomposes the same, and, further, also, whether the distribution is uniform or interrupted for a portion of the path, so as to lead to the wearing of the piston at such cants or by a change in the supply, 850.

parts. The defects thus ascertained may then be overcome by the use of other lubrifurther experiments or records it may then be stated whether by these changes of the lubricant or in its supply the desired result has been obtained or not.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

l. The herein-described method,whichconsists in causing a jet of fluid from the powercylinder of a motive-fluid-operated engine to impinge upon a surface moving across said jet and capable of indicating the relative quantity of lubricant mixed with the steam of said jet, substantially as and for the purpose set forth.

2. Theherein-described method,which consists in causing a jet of fluid from the powercylinder of a motive-fluid-operated engine to impinge upon a surface moving across said jet in synchronisni with the movements of the enginepiston and capable of indicating the relative quantity of lubricantin said jet,

substantially as and for the'purpose set forth.

3. The herein-described method,which consists in causing ajet of fluid from the powercylinder of a fluid-operated engine to impinge upon a surface capable of visibly indicating and recording the lubricant therein and moving across said jet, and simultaneously indicating the pressure under which the jet is produced, substantially as and for the pur- 

